I have a L05 3638 block, with a flat tap cam. It has the provisions for a roller cam and i am almost done swapping a lt1 cam in it. i am missing one part... the cam retainer plate. I got one sent from a 305 tpi engine and it didn't fit. the plate was not long enough to line up with the bolt holes. I dont know where to get one, so i am at a dead stop. Can someone help?

 

Try a dealership
There are two different retainer bolts patterns

Part # 10088128
Camshaft Retainer First design with 3.62" bolt center as used on ZZZ, ZZ1 and ZZ2 engines. 1988-1990 engines use # 10088218 with 3.620" bolt pattern.

Part # 10168501
Camshaft Retainer 2nd design with 3.294'' bolt center
Used with ZZ3 & ZZ4 Engines. Also Used on 1996-2000 L29 454 Big Block Chevy And 454, 502 GM Performance Parts Engines With Roller Camshafts & Gen VI Block.

 

yeah i have looked at each one and i dont know which to get. My guess would be one i have was the first design because it came from a 86-88 tpi engine. I guess that my l05 came from a 88-92 truck, so you would think the first design would fit since the second one says 1996-2000.

 

Measure across the retainer bolt holes in the block

 

In case you do not have upgraded the timing chain, the GMPP 12371043 chain kit comes with both style retainer plates.
https://www.thirdgen.org/forums/tech...2371043-a.html

 

I measured across the bolt holes (between the outside edge of each hole). it was just right under 4in. The retainer plate i have measures just above 3.75in.

Thomas1976, i already have the correct timing belt, but in the pic on that link i know i need the plate on the left, and i have the one on the right. The only problem is the dealerships photos look the same to me.

i greatly appreciate the help guys

 

You measure center of hole to center of hole and match it to the retainer measurements I gave above.

I listed the GM part numbers and the measurements above. Go by that , not pictures

 

there are TWO ones used,i had the same prob when building my LB9.it sounds like you need the early style,measure bolt hole to bolt hole i got mine from the local chevy dealership good luck